Praxis mit GnuPG Erzeugen eines Schlüsselpaars - Schritt 4: You need a Passphrase to protect your secret key. ***** We need to generate a lot of random bytes. It is a good idea to perform some other action (type on the keyboard, move the mouse, utilize the disks) during the prime generation; this gives the random number generator a better chance to gain enough entropy. [...]